1 /* $NetBSD: gzip.c,v 1.116 2018/10/27 11:39:12 skrll Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause-NetBSD 5 * 6 * Copyright (c) 1997, 1998, 2003, 2004, 2006, 2008, 2009, 2010, 2011, 2015, 2017 7 * Matthew R. Green 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 */ 32 33 #include <sys/cdefs.h> 34 #ifndef lint 35 __COPYRIGHT("@(#) Copyright (c) 1997, 1998, 2003, 2004, 2006, 2008,\ 36 2009, 2010, 2011, 2015, 2017 Matthew R. Green. All rights reserved."); 37 __FBSDID("$FreeBSD$"); 38 #endif /* not lint */ 39 40 /* 41 * gzip.c -- GPL free gzip using zlib. 42 * 43 * RFC 1950 covers the zlib format 44 * RFC 1951 covers the deflate format 45 * RFC 1952 covers the gzip format 46 * 47 * TODO: 48 * - use mmap where possible 49 * - make bzip2/compress -v/-t/-l support work as well as possible 50 */ 51 52 #include <sys/endian.h> 53 #include <sys/param.h> 54 #include <sys/stat.h> 55 #include <sys/time.h> 56 57 #include <inttypes.h> 58 #include <unistd.h> 59 #include <stdio.h> 60 #include <string.h> 61 #include <stdlib.h> 62 #include <err.h> 63 #include <errno.h> 64 #include <fcntl.h> 65 #include <zlib.h> 66 #include <fts.h> 67 #include <libgen.h> 68 #include <stdarg.h> 69 #include <getopt.h> 70 #include <time.h> 71 72 /* what type of file are we dealing with */ 73 enum filetype { 74 FT_GZIP, 75 #ifndef NO_BZIP2_SUPPORT 76 FT_BZIP2, 77 #endif 78 #ifndef NO_COMPRESS_SUPPORT 79 FT_Z, 80 #endif 81 #ifndef NO_PACK_SUPPORT 82 FT_PACK, 83 #endif 84 #ifndef NO_XZ_SUPPORT 85 FT_XZ, 86 #endif 87 #ifndef NO_LZ_SUPPORT 88 FT_LZ, 89 #endif 90 FT_LAST, 91 FT_UNKNOWN 92 }; 93 94 #ifndef NO_BZIP2_SUPPORT 95 #include <bzlib.h> 96 97 #define BZ2_SUFFIX ".bz2" 98 #define BZIP2_MAGIC "BZh" 99 #endif 100 101 #ifndef NO_COMPRESS_SUPPORT 102 #define Z_SUFFIX ".Z" 103 #define Z_MAGIC "\037\235" 104 #endif 105 106 #ifndef NO_PACK_SUPPORT 107 #define PACK_MAGIC "\037\036" 108 #endif 109 110 #ifndef NO_XZ_SUPPORT 111 #include <lzma.h> 112 #define XZ_SUFFIX ".xz" 113 #define XZ_MAGIC "\3757zXZ" 114 #endif 115 116 #ifndef NO_LZ_SUPPORT 117 #define LZ_SUFFIX ".lz" 118 #define LZ_MAGIC "LZIP" 119 #endif 120 121 #define GZ_SUFFIX ".gz" 122 123 #define BUFLEN (64 * 1024) 124 125 #define GZIP_MAGIC0 0x1F 126 #define GZIP_MAGIC1 0x8B 127 #define GZIP_OMAGIC1 0x9E 128 129 #define GZIP_TIMESTAMP (off_t)4 130 #define GZIP_ORIGNAME (off_t)10 131 132 #define HEAD_CRC 0x02 133 #define EXTRA_FIELD 0x04 134 #define ORIG_NAME 0x08 135 #define COMMENT 0x10 136 137 #define OS_CODE 3 /* Unix */ 138 139 typedef struct { 140 const char *zipped; 141 int ziplen; 142 const char *normal; /* for unzip - must not be longer than zipped */ 143 } suffixes_t; 144 static suffixes_t suffixes[] = { 145 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N} 146 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */ 147 #ifndef SMALL 148 SUFFIX(GZ_SUFFIX, ""), 149 SUFFIX(".z", ""), 150 SUFFIX("-gz", ""), 151 SUFFIX("-z", ""), 152 SUFFIX("_z", ""), 153 SUFFIX(".taz", ".tar"), 154 SUFFIX(".tgz", ".tar"), 155 #ifndef NO_BZIP2_SUPPORT 156 SUFFIX(BZ2_SUFFIX, ""), 157 SUFFIX(".tbz", ".tar"), 158 SUFFIX(".tbz2", ".tar"), 159 #endif 160 #ifndef NO_COMPRESS_SUPPORT 161 SUFFIX(Z_SUFFIX, ""), 162 #endif 163 #ifndef NO_XZ_SUPPORT 164 SUFFIX(XZ_SUFFIX, ""), 165 #endif 166 #ifndef NO_LZ_SUPPORT 167 SUFFIX(LZ_SUFFIX, ""), 168 #endif 169 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */ 170 #endif /* SMALL */ 171 #undef SUFFIX 172 }; 173 #define NUM_SUFFIXES (nitems(suffixes)) 174 #define SUFFIX_MAXLEN 30 175 176 static const char gzip_version[] = "FreeBSD gzip 20190107"; 177 178 #ifndef SMALL 179 static const char gzip_copyright[] = \ 180 " Copyright (c) 1997, 1998, 2003, 2004, 2006 Matthew R. Green\n" 181 " All rights reserved.\n" 182 "\n" 183 " Redistribution and use in source and binary forms, with or without\n" 184 " modification, are permitted provided that the following conditions\n" 185 " are met:\n" 186 " 1. Redistributions of source code must retain the above copyright\n" 187 " notice, this list of conditions and the following disclaimer.\n" 188 " 2. Redistributions in binary form must reproduce the above copyright\n" 189 " notice, this list of conditions and the following disclaimer in the\n" 190 " documentation and/or other materials provided with the distribution.\n" 191 "\n" 192 " THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR\n" 193 " IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES\n" 194 " OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.\n" 195 " IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,\n" 196 " INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,\n" 197 " BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n" 198 " LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED\n" 199 " AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,\n" 200 " OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\n" 201 " OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\n" 202 " SUCH DAMAGE."; 203 #endif 204 205 static int cflag; /* stdout mode */ 206 static int dflag; /* decompress mode */ 207 static int lflag; /* list mode */ 208 static int numflag = 6; /* gzip -1..-9 value */ 209 210 static const char *remove_file = NULL; /* file to be removed upon SIGINT */ 211 212 static int fflag; /* force mode */ 213 #ifndef SMALL 214 static int kflag; /* don't delete input files */ 215 static int nflag; /* don't save name/timestamp */ 216 static int Nflag; /* don't restore name/timestamp */ 217 static int qflag; /* quiet mode */ 218 static int rflag; /* recursive mode */ 219 static int tflag; /* test */ 220 static int vflag; /* verbose mode */ 221 static sig_atomic_t print_info = 0; 222 #else 223 #define qflag 0 224 #define tflag 0 225 #endif 226 227 static int exit_value = 0; /* exit value */ 228 229 static const char *infile; /* name of file coming in */ 230 231 static void maybe_err(const char *fmt, ...) __printflike(1, 2) __dead2; 232 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \ 233 !defined(NO_XZ_SUPPORT) 234 static void maybe_errx(const char *fmt, ...) __printflike(1, 2) __dead2; 235 #endif 236 static void maybe_warn(const char *fmt, ...) __printflike(1, 2); 237 static void maybe_warnx(const char *fmt, ...) __printflike(1, 2); 238 static enum filetype file_gettype(u_char *); 239 #ifdef SMALL 240 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz) 241 #endif 242 static off_t gz_compress(int, int, off_t *, const char *, uint32_t); 243 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *); 244 static off_t file_compress(char *, char *, size_t); 245 static off_t file_uncompress(char *, char *, size_t); 246 static void handle_pathname(char *); 247 static void handle_file(char *, struct stat *); 248 static void handle_stdin(void); 249 static void handle_stdout(void); 250 static void print_ratio(off_t, off_t, FILE *); 251 static void print_list(int fd, off_t, const char *, time_t); 252 static void usage(void) __dead2; 253 static void display_version(void) __dead2; 254 #ifndef SMALL 255 static void display_license(void); 256 #endif 257 static const suffixes_t *check_suffix(char *, int); 258 static ssize_t read_retry(int, void *, size_t); 259 static ssize_t write_retry(int, const void *, size_t); 260 static void print_list_out(off_t, off_t, const char*); 261 262 #ifdef SMALL 263 #define infile_set(f,t) infile_set(f) 264 #endif 265 static void infile_set(const char *newinfile, off_t total); 266 267 #ifdef SMALL 268 #define unlink_input(f, sb) unlink(f) 269 #define check_siginfo() /* nothing */ 270 #define setup_signals() /* nothing */ 271 #define infile_newdata(t) /* nothing */ 272 #else 273 static off_t infile_total; /* total expected to read/write */ 274 static off_t infile_current; /* current read/write */ 275 276 static void check_siginfo(void); 277 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd); 278 static void prepend_gzip(char *, int *, char ***); 279 static void handle_dir(char *); 280 static void print_verbage(const char *, const char *, off_t, off_t); 281 static void print_test(const char *, int); 282 static void copymodes(int fd, const struct stat *, const char *file); 283 static int check_outfile(const char *outfile); 284 static void setup_signals(void); 285 static void infile_newdata(size_t newdata); 286 static void infile_clear(void); 287 #endif 288 289 #ifndef NO_BZIP2_SUPPORT 290 static off_t unbzip2(int, int, char *, size_t, off_t *); 291 #endif 292 293 #ifndef NO_COMPRESS_SUPPORT 294 static FILE *zdopen(int); 295 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *); 296 #endif 297 298 #ifndef NO_PACK_SUPPORT 299 static off_t unpack(int, int, char *, size_t, off_t *); 300 #endif 301 302 #ifndef NO_XZ_SUPPORT 303 static off_t unxz(int, int, char *, size_t, off_t *); 304 static off_t unxz_len(int); 305 #endif 306 307 #ifndef NO_LZ_SUPPORT 308 static off_t unlz(int, int, char *, size_t, off_t *); 309 #endif 310 311 #ifdef SMALL 312 #define getopt_long(a,b,c,d,e) getopt(a,b,c) 313 #else 314 static const struct option longopts[] = { 315 { "stdout", no_argument, 0, 'c' }, 316 { "to-stdout", no_argument, 0, 'c' }, 317 { "decompress", no_argument, 0, 'd' }, 318 { "uncompress", no_argument, 0, 'd' }, 319 { "force", no_argument, 0, 'f' }, 320 { "help", no_argument, 0, 'h' }, 321 { "keep", no_argument, 0, 'k' }, 322 { "list", no_argument, 0, 'l' }, 323 { "no-name", no_argument, 0, 'n' }, 324 { "name", no_argument, 0, 'N' }, 325 { "quiet", no_argument, 0, 'q' }, 326 { "recursive", no_argument, 0, 'r' }, 327 { "suffix", required_argument, 0, 'S' }, 328 { "test", no_argument, 0, 't' }, 329 { "verbose", no_argument, 0, 'v' }, 330 { "version", no_argument, 0, 'V' }, 331 { "fast", no_argument, 0, '1' }, 332 { "best", no_argument, 0, '9' }, 333 { "ascii", no_argument, 0, 'a' }, 334 { "license", no_argument, 0, 'L' }, 335 { NULL, no_argument, 0, 0 }, 336 }; 337 #endif 338 339 int 340 main(int argc, char **argv) 341 { 342 const char *progname = getprogname(); 343 #ifndef SMALL 344 char *gzip; 345 int len; 346 #endif 347 int ch; 348 349 setup_signals(); 350 351 #ifndef SMALL 352 if ((gzip = getenv("GZIP")) != NULL) 353 prepend_gzip(gzip, &argc, &argv); 354 #endif 355 356 /* 357 * XXX 358 * handle being called `gunzip', `zcat' and `gzcat' 359 */ 360 if (strcmp(progname, "gunzip") == 0) 361 dflag = 1; 362 else if (strcmp(progname, "zcat") == 0 || 363 strcmp(progname, "gzcat") == 0) 364 dflag = cflag = 1; 365 366 #ifdef SMALL 367 #define OPT_LIST "123456789cdhlV" 368 #else 369 #define OPT_LIST "123456789acdfhklLNnqrS:tVv" 370 #endif 371 372 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) { 373 switch (ch) { 374 case '1': case '2': case '3': 375 case '4': case '5': case '6': 376 case '7': case '8': case '9': 377 numflag = ch - '0'; 378 break; 379 case 'c': 380 cflag = 1; 381 break; 382 case 'd': 383 dflag = 1; 384 break; 385 case 'l': 386 lflag = 1; 387 dflag = 1; 388 break; 389 case 'V': 390 display_version(); 391 /* NOTREACHED */ 392 #ifndef SMALL 393 case 'a': 394 fprintf(stderr, "%s: option --ascii ignored on this system\n", progname); 395 break; 396 case 'f': 397 fflag = 1; 398 break; 399 case 'k': 400 kflag = 1; 401 break; 402 case 'L': 403 display_license(); 404 /* NOT REACHED */ 405 case 'N': 406 nflag = 0; 407 Nflag = 1; 408 break; 409 case 'n': 410 nflag = 1; 411 Nflag = 0; 412 break; 413 case 'q': 414 qflag = 1; 415 break; 416 case 'r': 417 rflag = 1; 418 break; 419 case 'S': 420 len = strlen(optarg); 421 if (len != 0) { 422 if (len > SUFFIX_MAXLEN) 423 errx(1, "incorrect suffix: '%s': too long", optarg); 424 suffixes[0].zipped = optarg; 425 suffixes[0].ziplen = len; 426 } else { 427 suffixes[NUM_SUFFIXES - 1].zipped = ""; 428 suffixes[NUM_SUFFIXES - 1].ziplen = 0; 429 } 430 break; 431 case 't': 432 cflag = 1; 433 tflag = 1; 434 dflag = 1; 435 break; 436 case 'v': 437 vflag = 1; 438 break; 439 #endif 440 default: 441 usage(); 442 /* NOTREACHED */ 443 } 444 } 445 argv += optind; 446 argc -= optind; 447 448 if (argc == 0) { 449 if (dflag) /* stdin mode */ 450 handle_stdin(); 451 else /* stdout mode */ 452 handle_stdout(); 453 } else { 454 do { 455 handle_pathname(argv[0]); 456 } while (*++argv); 457 } 458 #ifndef SMALL 459 if (qflag == 0 && lflag && argc > 1) 460 print_list(-1, 0, "(totals)", 0); 461 #endif 462 exit(exit_value); 463 } 464 465 /* maybe print a warning */ 466 void 467 maybe_warn(const char *fmt, ...) 468 { 469 va_list ap; 470 471 if (qflag == 0) { 472 va_start(ap, fmt); 473 vwarn(fmt, ap); 474 va_end(ap); 475 } 476 if (exit_value == 0) 477 exit_value = 1; 478 } 479 480 /* ... without an errno. */ 481 void 482 maybe_warnx(const char *fmt, ...) 483 { 484 va_list ap; 485 486 if (qflag == 0) { 487 va_start(ap, fmt); 488 vwarnx(fmt, ap); 489 va_end(ap); 490 } 491 if (exit_value == 0) 492 exit_value = 1; 493 } 494 495 /* maybe print an error */ 496 void 497 maybe_err(const char *fmt, ...) 498 { 499 va_list ap; 500 501 if (qflag == 0) { 502 va_start(ap, fmt); 503 vwarn(fmt, ap); 504 va_end(ap); 505 } 506 exit(2); 507 } 508 509 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \ 510 !defined(NO_XZ_SUPPORT) 511 /* ... without an errno. */ 512 void 513 maybe_errx(const char *fmt, ...) 514 { 515 va_list ap; 516 517 if (qflag == 0) { 518 va_start(ap, fmt); 519 vwarnx(fmt, ap); 520 va_end(ap); 521 } 522 exit(2); 523 } 524 #endif 525 526 #ifndef SMALL 527 /* split up $GZIP and prepend it to the argument list */ 528 static void 529 prepend_gzip(char *gzip, int *argc, char ***argv) 530 { 531 char *s, **nargv, **ac; 532 int nenvarg = 0, i; 533 534 /* scan how many arguments there are */ 535 for (s = gzip;;) { 536 while (*s == ' ' || *s == '\t') 537 s++; 538 if (*s == 0) 539 goto count_done; 540 nenvarg++; 541 while (*s != ' ' && *s != '\t') 542 if (*s++ == 0) 543 goto count_done; 544 } 545 count_done: 546 /* punt early */ 547 if (nenvarg == 0) 548 return; 549 550 *argc += nenvarg; 551 ac = *argv; 552 553 nargv = (char **)malloc((*argc + 1) * sizeof(char *)); 554 if (nargv == NULL) 555 maybe_err("malloc"); 556 557 /* stash this away */ 558 *argv = nargv; 559 560 /* copy the program name first */ 561 i = 0; 562 nargv[i++] = *(ac++); 563 564 /* take a copy of $GZIP and add it to the array */ 565 s = strdup(gzip); 566 if (s == NULL) 567 maybe_err("strdup"); 568 for (;;) { 569 /* Skip whitespaces. */ 570 while (*s == ' ' || *s == '\t') 571 s++; 572 if (*s == 0) 573 goto copy_done; 574 nargv[i++] = s; 575 /* Find the end of this argument. */ 576 while (*s != ' ' && *s != '\t') 577 if (*s++ == 0) 578 /* Argument followed by NUL. */ 579 goto copy_done; 580 /* Terminate by overwriting ' ' or '\t' with NUL. */ 581 *s++ = 0; 582 } 583 copy_done: 584 585 /* copy the original arguments and a NULL */ 586 while (*ac) 587 nargv[i++] = *(ac++); 588 nargv[i] = NULL; 589 } 590 #endif 591 592 /* compress input to output. Return bytes read, -1 on error */ 593 static off_t 594 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime) 595 { 596 z_stream z; 597 char *outbufp, *inbufp; 598 off_t in_tot = 0, out_tot = 0; 599 ssize_t in_size; 600 int i, error; 601 uLong crc; 602 #ifdef SMALL 603 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0, 604 0, 0, 0, 0, 605 0, OS_CODE }; 606 #endif 607 608 outbufp = malloc(BUFLEN); 609 inbufp = malloc(BUFLEN); 610 if (outbufp == NULL || inbufp == NULL) { 611 maybe_err("malloc failed"); 612 goto out; 613 } 614 615 memset(&z, 0, sizeof z); 616 z.zalloc = Z_NULL; 617 z.zfree = Z_NULL; 618 z.opaque = 0; 619 620 #ifdef SMALL 621 memcpy(outbufp, header, sizeof header); 622 i = sizeof header; 623 #else 624 if (nflag != 0) { 625 mtime = 0; 626 origname = ""; 627 } 628 629 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s", 630 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 631 *origname ? ORIG_NAME : 0, 632 mtime & 0xff, 633 (mtime >> 8) & 0xff, 634 (mtime >> 16) & 0xff, 635 (mtime >> 24) & 0xff, 636 numflag == 1 ? 4 : numflag == 9 ? 2 : 0, 637 OS_CODE, origname); 638 if (i >= BUFLEN) 639 /* this need PATH_MAX > BUFLEN ... */ 640 maybe_err("snprintf"); 641 if (*origname) 642 i++; 643 #endif 644 645 z.next_out = (unsigned char *)outbufp + i; 646 z.avail_out = BUFLEN - i; 647 648 error = deflateInit2(&z, numflag, Z_DEFLATED, 649 (-MAX_WBITS), 8, Z_DEFAULT_STRATEGY); 650 if (error != Z_OK) { 651 maybe_warnx("deflateInit2 failed"); 652 in_tot = -1; 653 goto out; 654 } 655 656 crc = crc32(0L, Z_NULL, 0); 657 for (;;) { 658 if (z.avail_out == 0) { 659 if (write_retry(out, outbufp, BUFLEN) != BUFLEN) { 660 maybe_warn("write"); 661 out_tot = -1; 662 goto out; 663 } 664 665 out_tot += BUFLEN; 666 z.next_out = (unsigned char *)outbufp; 667 z.avail_out = BUFLEN; 668 } 669 670 if (z.avail_in == 0) { 671 in_size = read(in, inbufp, BUFLEN); 672 if (in_size < 0) { 673 maybe_warn("read"); 674 in_tot = -1; 675 goto out; 676 } 677 if (in_size == 0) 678 break; 679 infile_newdata(in_size); 680 681 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size); 682 in_tot += in_size; 683 z.next_in = (unsigned char *)inbufp; 684 z.avail_in = in_size; 685 } 686 687 error = deflate(&z, Z_NO_FLUSH); 688 if (error != Z_OK && error != Z_STREAM_END) { 689 maybe_warnx("deflate failed"); 690 in_tot = -1; 691 goto out; 692 } 693 } 694 695 /* clean up */ 696 for (;;) { 697 size_t len; 698 ssize_t w; 699 700 error = deflate(&z, Z_FINISH); 701 if (error != Z_OK && error != Z_STREAM_END) { 702 maybe_warnx("deflate failed"); 703 in_tot = -1; 704 goto out; 705 } 706 707 len = (char *)z.next_out - outbufp; 708 709 w = write_retry(out, outbufp, len); 710 if (w == -1 || (size_t)w != len) { 711 maybe_warn("write"); 712 out_tot = -1; 713 goto out; 714 } 715 out_tot += len; 716 z.next_out = (unsigned char *)outbufp; 717 z.avail_out = BUFLEN; 718 719 if (error == Z_STREAM_END) 720 break; 721 } 722 723 if (deflateEnd(&z) != Z_OK) { 724 maybe_warnx("deflateEnd failed"); 725 in_tot = -1; 726 goto out; 727 } 728 729 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c", 730 (int)crc & 0xff, 731 (int)(crc >> 8) & 0xff, 732 (int)(crc >> 16) & 0xff, 733 (int)(crc >> 24) & 0xff, 734 (int)in_tot & 0xff, 735 (int)(in_tot >> 8) & 0xff, 736 (int)(in_tot >> 16) & 0xff, 737 (int)(in_tot >> 24) & 0xff); 738 if (i != 8) 739 maybe_err("snprintf"); 740 if (write_retry(out, outbufp, i) != i) { 741 maybe_warn("write"); 742 in_tot = -1; 743 } else 744 out_tot += i; 745 746 out: 747 if (inbufp != NULL) 748 free(inbufp); 749 if (outbufp != NULL) 750 free(outbufp); 751 if (gsizep) 752 *gsizep = out_tot; 753 return in_tot; 754 } 755 756 /* 757 * uncompress input to output then close the input. return the 758 * uncompressed size written, and put the compressed sized read 759 * into `*gsizep'. 760 */ 761 static off_t 762 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep, 763 const char *filename) 764 { 765 z_stream z; 766 char *outbufp, *inbufp; 767 off_t out_tot = -1, in_tot = 0; 768 uint32_t out_sub_tot = 0; 769 enum { 770 GZSTATE_MAGIC0, 771 GZSTATE_MAGIC1, 772 GZSTATE_METHOD, 773 GZSTATE_FLAGS, 774 GZSTATE_SKIPPING, 775 GZSTATE_EXTRA, 776 GZSTATE_EXTRA2, 777 GZSTATE_EXTRA3, 778 GZSTATE_ORIGNAME, 779 GZSTATE_COMMENT, 780 GZSTATE_HEAD_CRC1, 781 GZSTATE_HEAD_CRC2, 782 GZSTATE_INIT, 783 GZSTATE_READ, 784 GZSTATE_CRC, 785 GZSTATE_LEN, 786 } state = GZSTATE_MAGIC0; 787 int flags = 0, skip_count = 0; 788 int error = Z_STREAM_ERROR, done_reading = 0; 789 uLong crc = 0; 790 ssize_t wr; 791 int needmore = 0; 792 793 #define ADVANCE() { z.next_in++; z.avail_in--; } 794 795 if ((outbufp = malloc(BUFLEN)) == NULL) { 796 maybe_err("malloc failed"); 797 goto out2; 798 } 799 if ((inbufp = malloc(BUFLEN)) == NULL) { 800 maybe_err("malloc failed"); 801 goto out1; 802 } 803 804 memset(&z, 0, sizeof z); 805 z.avail_in = prelen; 806 z.next_in = (unsigned char *)pre; 807 z.avail_out = BUFLEN; 808 z.next_out = (unsigned char *)outbufp; 809 z.zalloc = NULL; 810 z.zfree = NULL; 811 z.opaque = 0; 812 813 in_tot = prelen; 814 out_tot = 0; 815 816 for (;;) { 817 check_siginfo(); 818 if ((z.avail_in == 0 || needmore) && done_reading == 0) { 819 ssize_t in_size; 820 821 if (z.avail_in > 0) { 822 memmove(inbufp, z.next_in, z.avail_in); 823 } 824 z.next_in = (unsigned char *)inbufp; 825 in_size = read(in, z.next_in + z.avail_in, 826 BUFLEN - z.avail_in); 827 828 if (in_size == -1) { 829 maybe_warn("failed to read stdin"); 830 goto stop_and_fail; 831 } else if (in_size == 0) { 832 done_reading = 1; 833 } 834 infile_newdata(in_size); 835 836 z.avail_in += in_size; 837 needmore = 0; 838 839 in_tot += in_size; 840 } 841 if (z.avail_in == 0) { 842 if (done_reading && state != GZSTATE_MAGIC0) { 843 maybe_warnx("%s: unexpected end of file", 844 filename); 845 goto stop_and_fail; 846 } 847 goto stop; 848 } 849 switch (state) { 850 case GZSTATE_MAGIC0: 851 if (*z.next_in != GZIP_MAGIC0) { 852 if (in_tot > 0) { 853 maybe_warnx("%s: trailing garbage " 854 "ignored", filename); 855 exit_value = 2; 856 goto stop; 857 } 858 maybe_warnx("input not gziped (MAGIC0)"); 859 goto stop_and_fail; 860 } 861 ADVANCE(); 862 state++; 863 out_sub_tot = 0; 864 crc = crc32(0L, Z_NULL, 0); 865 break; 866 867 case GZSTATE_MAGIC1: 868 if (*z.next_in != GZIP_MAGIC1 && 869 *z.next_in != GZIP_OMAGIC1) { 870 maybe_warnx("input not gziped (MAGIC1)"); 871 goto stop_and_fail; 872 } 873 ADVANCE(); 874 state++; 875 break; 876 877 case GZSTATE_METHOD: 878 if (*z.next_in != Z_DEFLATED) { 879 maybe_warnx("unknown compression method"); 880 goto stop_and_fail; 881 } 882 ADVANCE(); 883 state++; 884 break; 885 886 case GZSTATE_FLAGS: 887 flags = *z.next_in; 888 ADVANCE(); 889 skip_count = 6; 890 state++; 891 break; 892 893 case GZSTATE_SKIPPING: 894 if (skip_count > 0) { 895 skip_count--; 896 ADVANCE(); 897 } else 898 state++; 899 break; 900 901 case GZSTATE_EXTRA: 902 if ((flags & EXTRA_FIELD) == 0) { 903 state = GZSTATE_ORIGNAME; 904 break; 905 } 906 skip_count = *z.next_in; 907 ADVANCE(); 908 state++; 909 break; 910 911 case GZSTATE_EXTRA2: 912 skip_count |= ((*z.next_in) << 8); 913 ADVANCE(); 914 state++; 915 break; 916 917 case GZSTATE_EXTRA3: 918 if (skip_count > 0) { 919 skip_count--; 920 ADVANCE(); 921 } else 922 state++; 923 break; 924 925 case GZSTATE_ORIGNAME: 926 if ((flags & ORIG_NAME) == 0) { 927 state++; 928 break; 929 } 930 if (*z.next_in == 0) 931 state++; 932 ADVANCE(); 933 break; 934 935 case GZSTATE_COMMENT: 936 if ((flags & COMMENT) == 0) { 937 state++; 938 break; 939 } 940 if (*z.next_in == 0) 941 state++; 942 ADVANCE(); 943 break; 944 945 case GZSTATE_HEAD_CRC1: 946 if (flags & HEAD_CRC) 947 skip_count = 2; 948 else 949 skip_count = 0; 950 state++; 951 break; 952 953 case GZSTATE_HEAD_CRC2: 954 if (skip_count > 0) { 955 skip_count--; 956 ADVANCE(); 957 } else 958 state++; 959 break; 960 961 case GZSTATE_INIT: 962 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) { 963 maybe_warnx("failed to inflateInit"); 964 goto stop_and_fail; 965 } 966 state++; 967 break; 968 969 case GZSTATE_READ: 970 error = inflate(&z, Z_FINISH); 971 switch (error) { 972 /* Z_BUF_ERROR goes with Z_FINISH... */ 973 case Z_BUF_ERROR: 974 if (z.avail_out > 0 && !done_reading) 975 continue; 976 977 case Z_STREAM_END: 978 case Z_OK: 979 break; 980 981 case Z_NEED_DICT: 982 maybe_warnx("Z_NEED_DICT error"); 983 goto stop_and_fail; 984 case Z_DATA_ERROR: 985 maybe_warnx("data stream error"); 986 goto stop_and_fail; 987 case Z_STREAM_ERROR: 988 maybe_warnx("internal stream error"); 989 goto stop_and_fail; 990 case Z_MEM_ERROR: 991 maybe_warnx("memory allocation error"); 992 goto stop_and_fail; 993 994 default: 995 maybe_warn("unknown error from inflate(): %d", 996 error); 997 } 998 wr = BUFLEN - z.avail_out; 999 1000 if (wr != 0) { 1001 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr); 1002 if ( 1003 #ifndef SMALL 1004 /* don't write anything with -t */ 1005 tflag == 0 && 1006 #endif 1007 write_retry(out, outbufp, wr) != wr) { 1008 maybe_warn("error writing to output"); 1009 goto stop_and_fail; 1010 } 1011 1012 out_tot += wr; 1013 out_sub_tot += wr; 1014 } 1015 1016 if (error == Z_STREAM_END) { 1017 inflateEnd(&z); 1018 state++; 1019 } 1020 1021 z.next_out = (unsigned char *)outbufp; 1022 z.avail_out = BUFLEN; 1023 1024 break; 1025 case GZSTATE_CRC: 1026 { 1027 uLong origcrc; 1028 1029 if (z.avail_in < 4) { 1030 if (!done_reading) { 1031 needmore = 1; 1032 continue; 1033 } 1034 maybe_warnx("truncated input"); 1035 goto stop_and_fail; 1036 } 1037 origcrc = le32dec(&z.next_in[0]); 1038 if (origcrc != crc) { 1039 maybe_warnx("invalid compressed" 1040 " data--crc error"); 1041 goto stop_and_fail; 1042 } 1043 } 1044 1045 z.avail_in -= 4; 1046 z.next_in += 4; 1047 1048 if (!z.avail_in && done_reading) { 1049 goto stop; 1050 } 1051 state++; 1052 break; 1053 case GZSTATE_LEN: 1054 { 1055 uLong origlen; 1056 1057 if (z.avail_in < 4) { 1058 if (!done_reading) { 1059 needmore = 1; 1060 continue; 1061 } 1062 maybe_warnx("truncated input"); 1063 goto stop_and_fail; 1064 } 1065 origlen = le32dec(&z.next_in[0]); 1066 1067 if (origlen != out_sub_tot) { 1068 maybe_warnx("invalid compressed" 1069 " data--length error"); 1070 goto stop_and_fail; 1071 } 1072 } 1073 1074 z.avail_in -= 4; 1075 z.next_in += 4; 1076 1077 if (error < 0) { 1078 maybe_warnx("decompression error"); 1079 goto stop_and_fail; 1080 } 1081 state = GZSTATE_MAGIC0; 1082 break; 1083 } 1084 continue; 1085 stop_and_fail: 1086 out_tot = -1; 1087 stop: 1088 break; 1089 } 1090 if (state > GZSTATE_INIT) 1091 inflateEnd(&z); 1092 1093 free(inbufp); 1094 out1: 1095 free(outbufp); 1096 out2: 1097 if (gsizep) 1098 *gsizep = in_tot; 1099 return (out_tot); 1100 } 1101 1102 #ifndef SMALL 1103 /* 1104 * set the owner, mode, flags & utimes using the given file descriptor. 1105 * file is only used in possible warning messages. 1106 */ 1107 static void 1108 copymodes(int fd, const struct stat *sbp, const char *file) 1109 { 1110 struct timespec times[2]; 1111 struct stat sb; 1112 1113 /* 1114 * If we have no info on the input, give this file some 1115 * default values and return.. 1116 */ 1117 if (sbp == NULL) { 1118 mode_t mask = umask(022); 1119 1120 (void)fchmod(fd, DEFFILEMODE & ~mask); 1121 (void)umask(mask); 1122 return; 1123 } 1124 sb = *sbp; 1125 1126 /* if the chown fails, remove set-id bits as-per compress(1) */ 1127 if (fchown(fd, sb.st_uid, sb.st_gid) < 0) { 1128 if (errno != EPERM) 1129 maybe_warn("couldn't fchown: %s", file); 1130 sb.st_mode &= ~(S_ISUID|S_ISGID); 1131 } 1132 1133 /* we only allow set-id and the 9 normal permission bits */ 1134 sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 1135 if (fchmod(fd, sb.st_mode) < 0) 1136 maybe_warn("couldn't fchmod: %s", file); 1137 1138 times[0] = sb.st_atim; 1139 times[1] = sb.st_mtim; 1140 if (futimens(fd, times) < 0) 1141 maybe_warn("couldn't futimens: %s", file); 1142 1143 /* only try flags if they exist already */ 1144 if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0) 1145 maybe_warn("couldn't fchflags: %s", file); 1146 } 1147 #endif 1148 1149 /* what sort of file is this? */ 1150 static enum filetype 1151 file_gettype(u_char *buf) 1152 { 1153 1154 if (buf[0] == GZIP_MAGIC0 && 1155 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1)) 1156 return FT_GZIP; 1157 else 1158 #ifndef NO_BZIP2_SUPPORT 1159 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 && 1160 buf[3] >= '0' && buf[3] <= '9') 1161 return FT_BZIP2; 1162 else 1163 #endif 1164 #ifndef NO_COMPRESS_SUPPORT 1165 if (memcmp(buf, Z_MAGIC, 2) == 0) 1166 return FT_Z; 1167 else 1168 #endif 1169 #ifndef NO_PACK_SUPPORT 1170 if (memcmp(buf, PACK_MAGIC, 2) == 0) 1171 return FT_PACK; 1172 else 1173 #endif 1174 #ifndef NO_XZ_SUPPORT 1175 if (memcmp(buf, XZ_MAGIC, 4) == 0) /* XXX: We only have 4 bytes */ 1176 return FT_XZ; 1177 else 1178 #endif 1179 #ifndef NO_LZ_SUPPORT 1180 if (memcmp(buf, LZ_MAGIC, 4) == 0) 1181 return FT_LZ; 1182 else 1183 #endif 1184 return FT_UNKNOWN; 1185 } 1186 1187 #ifndef SMALL 1188 /* check the outfile is OK. */ 1189 static int 1190 check_outfile(const char *outfile) 1191 { 1192 struct stat sb; 1193 int ok = 1; 1194 1195 if (lflag == 0 && stat(outfile, &sb) == 0) { 1196 if (fflag) 1197 unlink(outfile); 1198 else if (isatty(STDIN_FILENO)) { 1199 char ans[10] = { 'n', '\0' }; /* default */ 1200 1201 fprintf(stderr, "%s already exists -- do you wish to " 1202 "overwrite (y or n)? " , outfile); 1203 (void)fgets(ans, sizeof(ans) - 1, stdin); 1204 if (ans[0] != 'y' && ans[0] != 'Y') { 1205 fprintf(stderr, "\tnot overwriting\n"); 1206 ok = 0; 1207 } else 1208 unlink(outfile); 1209 } else { 1210 maybe_warnx("%s already exists -- skipping", outfile); 1211 ok = 0; 1212 } 1213 } 1214 return ok; 1215 } 1216 1217 static void 1218 unlink_input(const char *file, const struct stat *sb) 1219 { 1220 struct stat nsb; 1221 1222 if (kflag) 1223 return; 1224 if (stat(file, &nsb) != 0) 1225 /* Must be gone already */ 1226 return; 1227 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino) 1228 /* Definitely a different file */ 1229 return; 1230 unlink(file); 1231 } 1232 1233 static void 1234 got_sigint(int signo __unused) 1235 { 1236 1237 if (remove_file != NULL) 1238 unlink(remove_file); 1239 _exit(2); 1240 } 1241 1242 static void 1243 got_siginfo(int signo __unused) 1244 { 1245 1246 print_info = 1; 1247 } 1248 1249 static void 1250 setup_signals(void) 1251 { 1252 1253 signal(SIGINFO, got_siginfo); 1254 signal(SIGINT, got_sigint); 1255 } 1256 1257 static void 1258 infile_newdata(size_t newdata) 1259 { 1260 1261 infile_current += newdata; 1262 } 1263 #endif 1264 1265 static void 1266 infile_set(const char *newinfile, off_t total) 1267 { 1268 1269 if (newinfile) 1270 infile = newinfile; 1271 #ifndef SMALL 1272 infile_total = total; 1273 #endif 1274 } 1275 1276 static void 1277 infile_clear(void) 1278 { 1279 1280 infile = NULL; 1281 #ifndef SMALL 1282 infile_total = infile_current = 0; 1283 #endif 1284 } 1285 1286 static const suffixes_t * 1287 check_suffix(char *file, int xlate) 1288 { 1289 const suffixes_t *s; 1290 int len = strlen(file); 1291 char *sp; 1292 1293 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) { 1294 /* if it doesn't fit in "a.suf", don't bother */ 1295 if (s->ziplen >= len) 1296 continue; 1297 sp = file + len - s->ziplen; 1298 if (strcmp(s->zipped, sp) != 0) 1299 continue; 1300 if (xlate) 1301 strcpy(sp, s->normal); 1302 return s; 1303 } 1304 return NULL; 1305 } 1306 1307 /* 1308 * compress the given file: create a corresponding .gz file and remove the 1309 * original. 1310 */ 1311 static off_t 1312 file_compress(char *file, char *outfile, size_t outsize) 1313 { 1314 int in; 1315 int out; 1316 off_t size, in_size; 1317 #ifndef SMALL 1318 struct stat isb, osb; 1319 const suffixes_t *suff; 1320 #endif 1321 1322 in = open(file, O_RDONLY); 1323 if (in == -1) { 1324 maybe_warn("can't open %s", file); 1325 return (-1); 1326 } 1327 1328 #ifndef SMALL 1329 if (fstat(in, &isb) != 0) { 1330 maybe_warn("couldn't stat: %s", file); 1331 close(in); 1332 return (-1); 1333 } 1334 #endif 1335 1336 #ifndef SMALL 1337 if (fstat(in, &isb) != 0) { 1338 close(in); 1339 maybe_warn("can't stat %s", file); 1340 return -1; 1341 } 1342 infile_set(file, isb.st_size); 1343 #endif 1344 1345 if (cflag == 0) { 1346 #ifndef SMALL 1347 if (isb.st_nlink > 1 && fflag == 0) { 1348 maybe_warnx("%s has %ju other link%s -- " 1349 "skipping", file, 1350 (uintmax_t)isb.st_nlink - 1, 1351 isb.st_nlink == 1 ? "" : "s"); 1352 close(in); 1353 return -1; 1354 } 1355 1356 if (fflag == 0 && (suff = check_suffix(file, 0)) && 1357 suff->zipped[0] != 0) { 1358 maybe_warnx("%s already has %s suffix -- unchanged", 1359 file, suff->zipped); 1360 close(in); 1361 return (-1); 1362 } 1363 #endif 1364 1365 /* Add (usually) .gz to filename */ 1366 if ((size_t)snprintf(outfile, outsize, "%s%s", 1367 file, suffixes[0].zipped) >= outsize) 1368 memcpy(outfile + outsize - suffixes[0].ziplen - 1, 1369 suffixes[0].zipped, suffixes[0].ziplen + 1); 1370 1371 #ifndef SMALL 1372 if (check_outfile(outfile) == 0) { 1373 close(in); 1374 return (-1); 1375 } 1376 #endif 1377 } 1378 1379 if (cflag == 0) { 1380 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600); 1381 if (out == -1) { 1382 maybe_warn("could not create output: %s", outfile); 1383 fclose(stdin); 1384 return (-1); 1385 } 1386 #ifndef SMALL 1387 remove_file = outfile; 1388 #endif 1389 } else 1390 out = STDOUT_FILENO; 1391 1392 in_size = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime); 1393 1394 (void)close(in); 1395 1396 /* 1397 * If there was an error, in_size will be -1. 1398 * If we compressed to stdout, just return the size. 1399 * Otherwise stat the file and check it is the correct size. 1400 * We only blow away the file if we can stat the output and it 1401 * has the expected size. 1402 */ 1403 if (cflag != 0) 1404 return in_size == -1 ? -1 : size; 1405 1406 #ifndef SMALL 1407 if (fstat(out, &osb) != 0) { 1408 maybe_warn("couldn't stat: %s", outfile); 1409 goto bad_outfile; 1410 } 1411 1412 if (osb.st_size != size) { 1413 maybe_warnx("output file: %s wrong size (%ju != %ju), deleting", 1414 outfile, (uintmax_t)osb.st_size, (uintmax_t)size); 1415 goto bad_outfile; 1416 } 1417 1418 copymodes(out, &isb, outfile); 1419 remove_file = NULL; 1420 #endif 1421 if (close(out) == -1) 1422 maybe_warn("couldn't close output"); 1423 1424 /* output is good, ok to delete input */ 1425 unlink_input(file, &isb); 1426 return (size); 1427 1428 #ifndef SMALL 1429 bad_outfile: 1430 if (close(out) == -1) 1431 maybe_warn("couldn't close output"); 1432 1433 maybe_warnx("leaving original %s", file); 1434 unlink(outfile); 1435 return (size); 1436 #endif 1437 } 1438 1439 /* uncompress the given file and remove the original */ 1440 static off_t 1441 file_uncompress(char *file, char *outfile, size_t outsize) 1442 { 1443 struct stat isb, osb; 1444 off_t size; 1445 ssize_t rbytes; 1446 unsigned char fourbytes[4]; 1447 enum filetype method; 1448 int fd, ofd, zfd = -1; 1449 int error; 1450 size_t in_size; 1451 #ifndef SMALL 1452 ssize_t rv; 1453 time_t timestamp = 0; 1454 char name[PATH_MAX + 1]; 1455 #endif 1456 1457 /* gather the old name info */ 1458 1459 fd = open(file, O_RDONLY); 1460 if (fd < 0) { 1461 maybe_warn("can't open %s", file); 1462 goto lose; 1463 } 1464 if (fstat(fd, &isb) != 0) { 1465 maybe_warn("can't stat %s", file); 1466 goto lose; 1467 } 1468 if (S_ISREG(isb.st_mode)) 1469 in_size = isb.st_size; 1470 else 1471 in_size = 0; 1472 infile_set(file, in_size); 1473 1474 strlcpy(outfile, file, outsize); 1475 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) { 1476 maybe_warnx("%s: unknown suffix -- ignored", file); 1477 goto lose; 1478 } 1479 1480 rbytes = read(fd, fourbytes, sizeof fourbytes); 1481 if (rbytes != sizeof fourbytes) { 1482 /* we don't want to fail here. */ 1483 #ifndef SMALL 1484 if (fflag) 1485 goto lose; 1486 #endif 1487 if (rbytes == -1) 1488 maybe_warn("can't read %s", file); 1489 else 1490 goto unexpected_EOF; 1491 goto lose; 1492 } 1493 infile_newdata(rbytes); 1494 1495 method = file_gettype(fourbytes); 1496 #ifndef SMALL 1497 if (fflag == 0 && method == FT_UNKNOWN) { 1498 maybe_warnx("%s: not in gzip format", file); 1499 goto lose; 1500 } 1501 1502 #endif 1503 1504 #ifndef SMALL 1505 if (method == FT_GZIP && Nflag) { 1506 unsigned char ts[4]; /* timestamp */ 1507 1508 rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP); 1509 if (rv >= 0 && rv < (ssize_t)(sizeof ts)) 1510 goto unexpected_EOF; 1511 if (rv == -1) { 1512 if (!fflag) 1513 maybe_warn("can't read %s", file); 1514 goto lose; 1515 } 1516 infile_newdata(rv); 1517 timestamp = le32dec(&ts[0]); 1518 1519 if (fourbytes[3] & ORIG_NAME) { 1520 rbytes = pread(fd, name, sizeof(name) - 1, GZIP_ORIGNAME); 1521 if (rbytes < 0) { 1522 maybe_warn("can't read %s", file); 1523 goto lose; 1524 } 1525 if (name[0] != '\0') { 1526 char *dp, *nf; 1527 1528 /* Make sure that name is NUL-terminated */ 1529 name[rbytes] = '\0'; 1530 1531 /* strip saved directory name */ 1532 nf = strrchr(name, '/'); 1533 if (nf == NULL) 1534 nf = name; 1535 else 1536 nf++; 1537 1538 /* preserve original directory name */ 1539 dp = strrchr(file, '/'); 1540 if (dp == NULL) 1541 dp = file; 1542 else 1543 dp++; 1544 snprintf(outfile, outsize, "%.*s%.*s", 1545 (int) (dp - file), 1546 file, (int) rbytes, nf); 1547 } 1548 } 1549 } 1550 #endif 1551 lseek(fd, 0, SEEK_SET); 1552 1553 if (cflag == 0 || lflag) { 1554 #ifndef SMALL 1555 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) { 1556 maybe_warnx("%s has %ju other links -- skipping", 1557 file, (uintmax_t)isb.st_nlink - 1); 1558 goto lose; 1559 } 1560 if (nflag == 0 && timestamp) 1561 isb.st_mtime = timestamp; 1562 if (check_outfile(outfile) == 0) 1563 goto lose; 1564 #endif 1565 } 1566 1567 if (cflag) 1568 zfd = STDOUT_FILENO; 1569 else if (lflag) 1570 zfd = -1; 1571 else { 1572 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600); 1573 if (zfd == STDOUT_FILENO) { 1574 /* We won't close STDOUT_FILENO later... */ 1575 zfd = dup(zfd); 1576 close(STDOUT_FILENO); 1577 } 1578 if (zfd == -1) { 1579 maybe_warn("can't open %s", outfile); 1580 goto lose; 1581 } 1582 remove_file = outfile; 1583 } 1584 1585 switch (method) { 1586 #ifndef NO_BZIP2_SUPPORT 1587 case FT_BZIP2: 1588 /* XXX */ 1589 if (lflag) { 1590 maybe_warnx("no -l with bzip2 files"); 1591 goto lose; 1592 } 1593 1594 size = unbzip2(fd, zfd, NULL, 0, NULL); 1595 break; 1596 #endif 1597 1598 #ifndef NO_COMPRESS_SUPPORT 1599 case FT_Z: { 1600 FILE *in, *out; 1601 1602 /* XXX */ 1603 if (lflag) { 1604 maybe_warnx("no -l with Lempel-Ziv files"); 1605 goto lose; 1606 } 1607 1608 if ((in = zdopen(fd)) == NULL) { 1609 maybe_warn("zdopen for read: %s", file); 1610 goto lose; 1611 } 1612 1613 out = fdopen(dup(zfd), "w"); 1614 if (out == NULL) { 1615 maybe_warn("fdopen for write: %s", outfile); 1616 fclose(in); 1617 goto lose; 1618 } 1619 1620 size = zuncompress(in, out, NULL, 0, NULL); 1621 /* need to fclose() if ferror() is true... */ 1622 error = ferror(in); 1623 if (error | fclose(in)) { 1624 if (error) 1625 maybe_warn("failed infile"); 1626 else 1627 maybe_warn("failed infile fclose"); 1628 if (cflag == 0) 1629 unlink(outfile); 1630 (void)fclose(out); 1631 goto lose; 1632 } 1633 if (fclose(out) != 0) { 1634 maybe_warn("failed outfile fclose"); 1635 if (cflag == 0) 1636 unlink(outfile); 1637 goto lose; 1638 } 1639 break; 1640 } 1641 #endif 1642 1643 #ifndef NO_PACK_SUPPORT 1644 case FT_PACK: 1645 if (lflag) { 1646 maybe_warnx("no -l with packed files"); 1647 goto lose; 1648 } 1649 1650 size = unpack(fd, zfd, NULL, 0, NULL); 1651 break; 1652 #endif 1653 1654 #ifndef NO_XZ_SUPPORT 1655 case FT_XZ: 1656 if (lflag) { 1657 size = unxz_len(fd); 1658 print_list_out(in_size, size, file); 1659 return -1; 1660 } 1661 size = unxz(fd, zfd, NULL, 0, NULL); 1662 break; 1663 #endif 1664 1665 #ifndef NO_LZ_SUPPORT 1666 case FT_LZ: 1667 if (lflag) { 1668 maybe_warnx("no -l with lzip files"); 1669 goto lose; 1670 } 1671 size = unlz(fd, zfd, NULL, 0, NULL); 1672 break; 1673 #endif 1674 #ifndef SMALL 1675 case FT_UNKNOWN: 1676 if (lflag) { 1677 maybe_warnx("no -l for unknown filetypes"); 1678 goto lose; 1679 } 1680 size = cat_fd(NULL, 0, NULL, fd); 1681 break; 1682 #endif 1683 default: 1684 if (lflag) { 1685 print_list(fd, in_size, outfile, isb.st_mtime); 1686 close(fd); 1687 return -1; /* XXX */ 1688 } 1689 1690 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file); 1691 break; 1692 } 1693 1694 if (close(fd) != 0) 1695 maybe_warn("couldn't close input"); 1696 if (zfd != STDOUT_FILENO && close(zfd) != 0) 1697 maybe_warn("couldn't close output"); 1698 1699 if (size == -1) { 1700 if (cflag == 0) 1701 unlink(outfile); 1702 maybe_warnx("%s: uncompress failed", file); 1703 return -1; 1704 } 1705 1706 /* if testing, or we uncompressed to stdout, this is all we need */ 1707 #ifndef SMALL 1708 if (tflag) 1709 return size; 1710 #endif 1711 /* if we are uncompressing to stdin, don't remove the file. */ 1712 if (cflag) 1713 return size; 1714 1715 /* 1716 * if we create a file... 1717 */ 1718 /* 1719 * if we can't stat the file don't remove the file. 1720 */ 1721 1722 ofd = open(outfile, O_RDWR, 0); 1723 if (ofd == -1) { 1724 maybe_warn("couldn't open (leaving original): %s", 1725 outfile); 1726 return -1; 1727 } 1728 if (fstat(ofd, &osb) != 0) { 1729 maybe_warn("couldn't stat (leaving original): %s", 1730 outfile); 1731 close(ofd); 1732 return -1; 1733 } 1734 if (osb.st_size != size) { 1735 maybe_warnx("stat gave different size: %ju != %ju (leaving original)", 1736 (uintmax_t)size, (uintmax_t)osb.st_size); 1737 close(ofd); 1738 unlink(outfile); 1739 return -1; 1740 } 1741 #ifndef SMALL 1742 copymodes(ofd, &isb, outfile); 1743 remove_file = NULL; 1744 #endif 1745 close(ofd); 1746 unlink_input(file, &isb); 1747 return size; 1748 1749 unexpected_EOF: 1750 maybe_warnx("%s: unexpected end of file", file); 1751 lose: 1752 if (fd != -1) 1753 close(fd); 1754 if (zfd != -1 && zfd != STDOUT_FILENO) 1755 close(zfd); 1756 return -1; 1757 } 1758 1759 #ifndef SMALL 1760 static void 1761 check_siginfo(void) 1762 { 1763 if (print_info == 0) 1764 return; 1765 if (infile) { 1766 if (infile_total) { 1767 int pcent = (int)((100.0 * infile_current) / infile_total); 1768 1769 fprintf(stderr, "%s: done %llu/%llu bytes %d%%\n", 1770 infile, (unsigned long long)infile_current, 1771 (unsigned long long)infile_total, pcent); 1772 } else 1773 fprintf(stderr, "%s: done %llu bytes\n", 1774 infile, (unsigned long long)infile_current); 1775 } 1776 print_info = 0; 1777 } 1778 1779 static off_t 1780 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd) 1781 { 1782 char buf[BUFLEN]; 1783 off_t in_tot; 1784 ssize_t w; 1785 1786 in_tot = count; 1787 w = write_retry(STDOUT_FILENO, prepend, count); 1788 if (w == -1 || (size_t)w != count) { 1789 maybe_warn("write to stdout"); 1790 return -1; 1791 } 1792 for (;;) { 1793 ssize_t rv; 1794 1795 rv = read(fd, buf, sizeof buf); 1796 if (rv == 0) 1797 break; 1798 if (rv < 0) { 1799 maybe_warn("read from fd %d", fd); 1800 break; 1801 } 1802 infile_newdata(rv); 1803 1804 if (write_retry(STDOUT_FILENO, buf, rv) != rv) { 1805 maybe_warn("write to stdout"); 1806 break; 1807 } 1808 in_tot += rv; 1809 } 1810 1811 if (gsizep) 1812 *gsizep = in_tot; 1813 return (in_tot); 1814 } 1815 #endif 1816 1817 static void 1818 handle_stdin(void) 1819 { 1820 struct stat isb; 1821 unsigned char fourbytes[4]; 1822 size_t in_size; 1823 off_t usize, gsize; 1824 enum filetype method; 1825 ssize_t bytes_read; 1826 #ifndef NO_COMPRESS_SUPPORT 1827 FILE *in; 1828 #endif 1829 1830 #ifndef SMALL 1831 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) { 1832 maybe_warnx("standard input is a terminal -- ignoring"); 1833 goto out; 1834 } 1835 #endif 1836 1837 if (fstat(STDIN_FILENO, &isb) < 0) { 1838 maybe_warn("fstat"); 1839 goto out; 1840 } 1841 if (S_ISREG(isb.st_mode)) 1842 in_size = isb.st_size; 1843 else 1844 in_size = 0; 1845 infile_set("(stdin)", in_size); 1846 1847 if (lflag) { 1848 print_list(STDIN_FILENO, in_size, infile, isb.st_mtime); 1849 goto out; 1850 } 1851 1852 bytes_read = read_retry(STDIN_FILENO, fourbytes, sizeof fourbytes); 1853 if (bytes_read == -1) { 1854 maybe_warn("can't read stdin"); 1855 goto out; 1856 } else if (bytes_read != sizeof(fourbytes)) { 1857 maybe_warnx("(stdin): unexpected end of file"); 1858 goto out; 1859 } 1860 1861 method = file_gettype(fourbytes); 1862 switch (method) { 1863 default: 1864 #ifndef SMALL 1865 if (fflag == 0) { 1866 maybe_warnx("unknown compression format"); 1867 goto out; 1868 } 1869 usize = cat_fd(fourbytes, sizeof fourbytes, &gsize, STDIN_FILENO); 1870 break; 1871 #endif 1872 case FT_GZIP: 1873 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO, 1874 (char *)fourbytes, sizeof fourbytes, &gsize, "(stdin)"); 1875 break; 1876 #ifndef NO_BZIP2_SUPPORT 1877 case FT_BZIP2: 1878 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO, 1879 (char *)fourbytes, sizeof fourbytes, &gsize); 1880 break; 1881 #endif 1882 #ifndef NO_COMPRESS_SUPPORT 1883 case FT_Z: 1884 if ((in = zdopen(STDIN_FILENO)) == NULL) { 1885 maybe_warnx("zopen of stdin"); 1886 goto out; 1887 } 1888 1889 usize = zuncompress(in, stdout, (char *)fourbytes, 1890 sizeof fourbytes, &gsize); 1891 fclose(in); 1892 break; 1893 #endif 1894 #ifndef NO_PACK_SUPPORT 1895 case FT_PACK: 1896 usize = unpack(STDIN_FILENO, STDOUT_FILENO, 1897 (char *)fourbytes, sizeof fourbytes, &gsize); 1898 break; 1899 #endif 1900 #ifndef NO_XZ_SUPPORT 1901 case FT_XZ: 1902 usize = unxz(STDIN_FILENO, STDOUT_FILENO, 1903 (char *)fourbytes, sizeof fourbytes, &gsize); 1904 break; 1905 #endif 1906 #ifndef NO_LZ_SUPPORT 1907 case FT_LZ: 1908 usize = unlz(STDIN_FILENO, STDOUT_FILENO, 1909 (char *)fourbytes, sizeof fourbytes, &gsize); 1910 break; 1911 #endif 1912 } 1913 1914 #ifndef SMALL 1915 if (vflag && !tflag && usize != -1 && gsize != -1) 1916 print_verbage(NULL, NULL, usize, gsize); 1917 if (vflag && tflag) 1918 print_test("(stdin)", usize != -1); 1919 #else 1920 (void)&usize; 1921 #endif 1922 1923 out: 1924 infile_clear(); 1925 } 1926 1927 static void 1928 handle_stdout(void) 1929 { 1930 off_t gsize; 1931 #ifndef SMALL 1932 off_t usize; 1933 struct stat sb; 1934 time_t systime; 1935 uint32_t mtime; 1936 int ret; 1937 1938 infile_set("(stdout)", 0); 1939 1940 if (fflag == 0 && isatty(STDOUT_FILENO)) { 1941 maybe_warnx("standard output is a terminal -- ignoring"); 1942 return; 1943 } 1944 1945 /* If stdin is a file use its mtime, otherwise use current time */ 1946 ret = fstat(STDIN_FILENO, &sb); 1947 if (ret < 0) { 1948 maybe_warn("Can't stat stdin"); 1949 return; 1950 } 1951 1952 if (S_ISREG(sb.st_mode)) { 1953 infile_set("(stdout)", sb.st_size); 1954 mtime = (uint32_t)sb.st_mtime; 1955 } else { 1956 systime = time(NULL); 1957 if (systime == -1) { 1958 maybe_warn("time"); 1959 return; 1960 } 1961 mtime = (uint32_t)systime; 1962 } 1963 1964 usize = 1965 #endif 1966 gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime); 1967 #ifndef SMALL 1968 if (vflag && !tflag && usize != -1 && gsize != -1) 1969 print_verbage(NULL, NULL, usize, gsize); 1970 #endif 1971 } 1972 1973 /* do what is asked for, for the path name */ 1974 static void 1975 handle_pathname(char *path) 1976 { 1977 char *opath = path, *s = NULL; 1978 ssize_t len; 1979 int slen; 1980 struct stat sb; 1981 1982 /* check for stdout/stdin */ 1983 if (path[0] == '-' && path[1] == '\0') { 1984 if (dflag) 1985 handle_stdin(); 1986 else 1987 handle_stdout(); 1988 return; 1989 } 1990 1991 retry: 1992 if (stat(path, &sb) != 0 || (fflag == 0 && cflag == 0 && 1993 lstat(path, &sb) != 0)) { 1994 /* lets try <path>.gz if we're decompressing */ 1995 if (dflag && s == NULL && errno == ENOENT) { 1996 len = strlen(path); 1997 slen = suffixes[0].ziplen; 1998 s = malloc(len + slen + 1); 1999 if (s == NULL) 2000 maybe_err("malloc"); 2001 memcpy(s, path, len); 2002 memcpy(s + len, suffixes[0].zipped, slen + 1); 2003 path = s; 2004 goto retry; 2005 } 2006 maybe_warn("can't stat: %s", opath); 2007 goto out; 2008 } 2009 2010 if (S_ISDIR(sb.st_mode)) { 2011 #ifndef SMALL 2012 if (rflag) 2013 handle_dir(path); 2014 else 2015 #endif 2016 maybe_warnx("%s is a directory", path); 2017 goto out; 2018 } 2019 2020 if (S_ISREG(sb.st_mode)) 2021 handle_file(path, &sb); 2022 else 2023 maybe_warnx("%s is not a regular file", path); 2024 2025 out: 2026 if (s) 2027 free(s); 2028 } 2029 2030 /* compress/decompress a file */ 2031 static void 2032 handle_file(char *file, struct stat *sbp) 2033 { 2034 off_t usize, gsize; 2035 char outfile[PATH_MAX]; 2036 2037 infile_set(file, sbp->st_size); 2038 if (dflag) { 2039 usize = file_uncompress(file, outfile, sizeof(outfile)); 2040 #ifndef SMALL 2041 if (vflag && tflag) 2042 print_test(file, usize != -1); 2043 #endif 2044 if (usize == -1) 2045 return; 2046 gsize = sbp->st_size; 2047 } else { 2048 gsize = file_compress(file, outfile, sizeof(outfile)); 2049 if (gsize == -1) 2050 return; 2051 usize = sbp->st_size; 2052 } 2053 infile_clear(); 2054 2055 #ifndef SMALL 2056 if (vflag && !tflag) 2057 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize); 2058 #endif 2059 } 2060 2061 #ifndef SMALL 2062 /* this is used with -r to recursively descend directories */ 2063 static void 2064 handle_dir(char *dir) 2065 { 2066 char *path_argv[2]; 2067 FTS *fts; 2068 FTSENT *entry; 2069 2070 path_argv[0] = dir; 2071 path_argv[1] = 0; 2072 fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL); 2073 if (fts == NULL) { 2074 warn("couldn't fts_open %s", dir); 2075 return; 2076 } 2077 2078 while ((entry = fts_read(fts))) { 2079 switch(entry->fts_info) { 2080 case FTS_D: 2081 case FTS_DP: 2082 continue; 2083 2084 case FTS_DNR: 2085 case FTS_ERR: 2086 case FTS_NS: 2087 maybe_warn("%s", entry->fts_path); 2088 continue; 2089 case FTS_F: 2090 handle_file(entry->fts_path, entry->fts_statp); 2091 } 2092 } 2093 (void)fts_close(fts); 2094 } 2095 #endif 2096 2097 /* print a ratio - size reduction as a fraction of uncompressed size */ 2098 static void 2099 print_ratio(off_t in, off_t out, FILE *where) 2100 { 2101 int percent10; /* 10 * percent */ 2102 off_t diff; 2103 char buff[8]; 2104 int len; 2105 2106 diff = in - out/2; 2107 if (in == 0 && out == 0) 2108 percent10 = 0; 2109 else if (diff < 0) 2110 /* 2111 * Output is more than double size of input! print -99.9% 2112 * Quite possibly we've failed to get the original size. 2113 */ 2114 percent10 = -999; 2115 else { 2116 /* 2117 * We only need 12 bits of result from the final division, 2118 * so reduce the values until a 32bit division will suffice. 2119 */ 2120 while (in > 0x100000) { 2121 diff >>= 1; 2122 in >>= 1; 2123 } 2124 if (in != 0) 2125 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000; 2126 else 2127 percent10 = 0; 2128 } 2129 2130 len = snprintf(buff, sizeof buff, "%2.2d.", percent10); 2131 /* Move the '.' to before the last digit */ 2132 buff[len - 1] = buff[len - 2]; 2133 buff[len - 2] = '.'; 2134 fprintf(where, "%5s%%", buff); 2135 } 2136 2137 #ifndef SMALL 2138 /* print compression statistics, and the new name (if there is one!) */ 2139 static void 2140 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize) 2141 { 2142 if (file) 2143 fprintf(stderr, "%s:%s ", file, 2144 strlen(file) < 7 ? "\t\t" : "\t"); 2145 print_ratio(usize, gsize, stderr); 2146 if (nfile) 2147 fprintf(stderr, " -- replaced with %s", nfile); 2148 fprintf(stderr, "\n"); 2149 fflush(stderr); 2150 } 2151 2152 /* print test results */ 2153 static void 2154 print_test(const char *file, int ok) 2155 { 2156 2157 if (exit_value == 0 && ok == 0) 2158 exit_value = 1; 2159 fprintf(stderr, "%s:%s %s\n", file, 2160 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK"); 2161 fflush(stderr); 2162 } 2163 #endif 2164 2165 /* print a file's info ala --list */ 2166 /* eg: 2167 compressed uncompressed ratio uncompressed_name 2168 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar 2169 */ 2170 static void 2171 print_list(int fd, off_t out, const char *outfile, time_t ts) 2172 { 2173 static int first = 1; 2174 #ifndef SMALL 2175 static off_t in_tot, out_tot; 2176 uint32_t crc = 0; 2177 #endif 2178 off_t in = 0, rv; 2179 2180 if (first) { 2181 #ifndef SMALL 2182 if (vflag) 2183 printf("method crc date time "); 2184 #endif 2185 if (qflag == 0) 2186 printf(" compressed uncompressed " 2187 "ratio uncompressed_name\n"); 2188 } 2189 first = 0; 2190 2191 /* print totals? */ 2192 #ifndef SMALL 2193 if (fd == -1) { 2194 in = in_tot; 2195 out = out_tot; 2196 } else 2197 #endif 2198 { 2199 /* read the last 4 bytes - this is the uncompressed size */ 2200 rv = lseek(fd, (off_t)(-8), SEEK_END); 2201 if (rv != -1) { 2202 unsigned char buf[8]; 2203 uint32_t usize; 2204 2205 rv = read(fd, (char *)buf, sizeof(buf)); 2206 if (rv == -1) 2207 maybe_warn("read of uncompressed size"); 2208 else if (rv != sizeof(buf)) 2209 maybe_warnx("read of uncompressed size"); 2210 2211 else { 2212 usize = le32dec(&buf[4]); 2213 in = (off_t)usize; 2214 #ifndef SMALL 2215 crc = le32dec(&buf[0]); 2216 #endif 2217 } 2218 } 2219 } 2220 2221 #ifndef SMALL 2222 if (vflag && fd == -1) 2223 printf(" "); 2224 else if (vflag) { 2225 char *date = ctime(&ts); 2226 2227 /* skip the day, 1/100th second, and year */ 2228 date += 4; 2229 date[12] = 0; 2230 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date); 2231 } 2232 in_tot += in; 2233 out_tot += out; 2234 #else 2235 (void)&ts; /* XXX */ 2236 #endif 2237 print_list_out(out, in, outfile); 2238 } 2239 2240 static void 2241 print_list_out(off_t out, off_t in, const char *outfile) 2242 { 2243 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in); 2244 print_ratio(in, out, stdout); 2245 printf(" %s\n", outfile); 2246 } 2247 2248 /* display the usage of NetBSD gzip */ 2249 static void 2250 usage(void) 2251 { 2252 2253 fprintf(stderr, "%s\n", gzip_version); 2254 fprintf(stderr, 2255 #ifdef SMALL 2256 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n", 2257 #else 2258 "usage: %s [-123456789acdfhklLNnqrtVv] [-S .suffix] [<file> [<file> ...]]\n" 2259 " -1 --fast fastest (worst) compression\n" 2260 " -2 .. -8 set compression level\n" 2261 " -9 --best best (slowest) compression\n" 2262 " -c --stdout write to stdout, keep original files\n" 2263 " --to-stdout\n" 2264 " -d --decompress uncompress files\n" 2265 " --uncompress\n" 2266 " -f --force force overwriting & compress links\n" 2267 " -h --help display this help\n" 2268 " -k --keep don't delete input files during operation\n" 2269 " -l --list list compressed file contents\n" 2270 " -N --name save or restore original file name and time stamp\n" 2271 " -n --no-name don't save original file name or time stamp\n" 2272 " -q --quiet output no warnings\n" 2273 " -r --recursive recursively compress files in directories\n" 2274 " -S .suf use suffix .suf instead of .gz\n" 2275 " --suffix .suf\n" 2276 " -t --test test compressed file\n" 2277 " -V --version display program version\n" 2278 " -v --verbose print extra statistics\n", 2279 #endif 2280 getprogname()); 2281 exit(0); 2282 } 2283 2284 #ifndef SMALL 2285 /* display the license information of FreeBSD gzip */ 2286 static void 2287 display_license(void) 2288 { 2289 2290 fprintf(stderr, "%s (based on NetBSD gzip 20150113)\n", gzip_version); 2291 fprintf(stderr, "%s\n", gzip_copyright); 2292 exit(0); 2293 } 2294 #endif 2295 2296 /* display the version of NetBSD gzip */ 2297 static void 2298 display_version(void) 2299 { 2300 2301 fprintf(stderr, "%s\n", gzip_version); 2302 exit(0); 2303 } 2304 2305 #ifndef NO_BZIP2_SUPPORT 2306 #include "unbzip2.c" 2307 #endif 2308 #ifndef NO_COMPRESS_SUPPORT 2309 #include "zuncompress.c" 2310 #endif 2311 #ifndef NO_PACK_SUPPORT 2312 #include "unpack.c" 2313 #endif 2314 #ifndef NO_XZ_SUPPORT 2315 #include "unxz.c" 2316 #endif 2317 #ifndef NO_LZ_SUPPORT 2318 #include "unlz.c" 2319 #endif 2320 2321 static ssize_t 2322 read_retry(int fd, void *buf, size_t sz) 2323 { 2324 char *cp = buf; 2325 size_t left = MIN(sz, (size_t) SSIZE_MAX); 2326 2327 while (left > 0) { 2328 ssize_t ret; 2329 2330 ret = read(fd, cp, left); 2331 if (ret == -1) { 2332 return ret; 2333 } else if (ret == 0) { 2334 break; /* EOF */ 2335 } 2336 cp += ret; 2337 left -= ret; 2338 } 2339 2340 return sz - left; 2341 } 2342 2343 static ssize_t 2344 write_retry(int fd, const void *buf, size_t sz) 2345 { 2346 const char *cp = buf; 2347 size_t left = MIN(sz, (size_t) SSIZE_MAX); 2348 2349 while (left > 0) { 2350 ssize_t ret; 2351 2352 ret = write(fd, cp, left); 2353 if (ret == -1) { 2354 return ret; 2355 } else if (ret == 0) { 2356 abort(); /* Can't happen */ 2357 } 2358 cp += ret; 2359 left -= ret; 2360 } 2361 2362 return sz - left; 2363 } 2364